function validateName(name) {
		if (name == null || name == "") {
			return false;
		} else {
			return true;
		}
	}


	function validateBirthYear(birthYear) {
		if (birthYear == null || birthYear == "") {
			return true;
		} else {
			if (isNaN(birthYear) || birthYear >2020) {
				return false;
			}
		}
		return true;
	}

	function validateEmail(email) {
		if (email == null || email == "") {
			return false;
		}

		var at="@"
		var dot="."
		var lat=email.indexOf(at)
		var lstr=email.length
		var ldot=email.indexOf(dot)
		if (email.indexOf(at)==-1){
		   return false;
		}

		if (email.indexOf(at)==-1 || email.indexOf(at)==0 || email.indexOf(at)==lstr){
		   return false;
		}

		if (email.indexOf(dot)==-1 || email.indexOf(dot)==0 || email.indexOf(dot)==lstr){
		    return false;
		}

		 if (email.indexOf(at,(lat+1))!=-1){
		    return false;
		 }

		 if (email.substring(lat-1,lat)==dot || email.substring(lat+1,lat+2)==dot){
		    return false;
		 }

		 if (email.indexOf(dot,(lat+2))==-1){
		    return false;
		 }
		
		 if (email.indexOf(" ")!=-1){
		    return false;
		 }

 		 return true;
	}